(19)

(11)

EP 2 593 755 A2

(12)

(88) Date of publication A3: 28.06.2012 (43) Date of publication: 22.05.2013 Bulletin 2013/21 (21) Application number: 11749753.7 (22) Date of filing: 14.07.2011

(51) International Patent Classification (IPC):  G01D 5/34(2006.01) G01S 3/783(2006.01) G01C 3/08(2006.01) (86) International application number: PCT/EP2011/062104 (87) International publication number: WO 2012/007561 (19.01.2012 Gazette 2012/03)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 16.07.2010 US 344408 P (71) Applicant: CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement 2002 Neuchâtel (CH)	(72) Inventors: GRENET, Eric CH-2000 Neuchâtel (CH) MASA, Peter CH-1425 Onnens (CH) FRANZI, Edoardo CH-1400 Yverdon-les-Bains (CH) HASLER, David CH-2000 Neuchâtel (CH) (74) Representative: GLN SA  Avenue Edouard-Dubois 20 2000 Neuchâtel 2000 Neuchâtel (CH)